*{
    background-color: silver;
}
.div1_static,.div1_fix,.div1_relative,.div1_abs
{
    background-color: white;
}
.box_red,.box_red2{
    background-color: red;
}
.box_green,.box_green2{
    background-color: green;
}
.box_blue,.box_blue2{
    background-color: blue;
}
.box_red_sticky{
    background-color: yellow;
}